2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
34 #include <linux/ata.h>
35 #include <linux/workqueue.h>
38 * compile-time options: to be removed as soon as all the drivers are
39 * converted to the new debugging mechanism
41 #undef ATA_DEBUG /* debugging output */
42 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
43 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
44 #undef ATA_NDEBUG /* define to disable quick runtime checks */
45 #undef ATA_ENABLE_PATA /* define to enable PATA support in some
46 * low-level drivers */
47 #undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */
50 /* note: prints function name for you */
52 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
53 #ifdef ATA_VERBOSE_DEBUG
54 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
56 #define VPRINTK(fmt, args...)
57 #endif /* ATA_VERBOSE_DEBUG */
59 #define DPRINTK(fmt, args...)
60 #define VPRINTK(fmt, args...)
61 #endif /* ATA_DEBUG */
63 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
68 #define assert(expr) \
69 if(unlikely(!(expr))) { \
70 printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
71 #expr,__FILE__,__FUNCTION__,__LINE__); \
75 /* NEW: debug levels */
76 #define HAVE_LIBATA_MSG 1
80 ATA_MSG_INFO
= 0x0002,
81 ATA_MSG_PROBE
= 0x0004,
82 ATA_MSG_WARN
= 0x0008,
83 ATA_MSG_MALLOC
= 0x0010,
85 ATA_MSG_INTR
= 0x0040,
89 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
90 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
91 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
92 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
93 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
94 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
95 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
96 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98 static inline u32
ata_msg_init(int dval
, int default_msg_enable_bits
)
100 if (dval
< 0 || dval
>= (sizeof(u32
) * 8))
101 return default_msg_enable_bits
; /* should be 0x1 - only driver info msgs */
104 return (1 << dval
) - 1;
107 /* defines only for the constants which don't work well as enums */
108 #define ATA_TAG_POISON 0xfafbfcfdU
110 /* move to PCI layer? */
111 static inline struct device
*pci_dev_to_dev(struct pci_dev
*pdev
)
117 /* various global constants */
118 LIBATA_MAX_PRD
= ATA_MAX_PRD
/ 2,
122 ATA_MAX_SECTORS
= 200, /* FIXME */
124 ATA_DEF_BUSY_WAIT
= 10000,
125 ATA_SHORT_PAUSE
= (HZ
>> 6) + 1,
127 ATA_SHT_EMULATED
= 1,
128 ATA_SHT_CMD_PER_LUN
= 1,
129 ATA_SHT_THIS_ID
= -1,
130 ATA_SHT_USE_CLUSTERING
= 1,
132 /* struct ata_device stuff */
133 ATA_DFLAG_LBA48
= (1 << 0), /* device supports LBA48 */
134 ATA_DFLAG_PIO
= (1 << 1), /* device currently in PIO mode */
135 ATA_DFLAG_LOCK_SECTORS
= (1 << 2), /* don't adjust max_sectors */
136 ATA_DFLAG_LBA
= (1 << 3), /* device supports LBA */
138 ATA_DEV_UNKNOWN
= 0, /* unknown device */
139 ATA_DEV_ATA
= 1, /* ATA device */
140 ATA_DEV_ATA_UNSUP
= 2, /* ATA device (unsupported) */
141 ATA_DEV_ATAPI
= 3, /* ATAPI device */
142 ATA_DEV_ATAPI_UNSUP
= 4, /* ATAPI device (unsupported) */
143 ATA_DEV_NONE
= 5, /* no device */
145 /* struct ata_port flags */
146 ATA_FLAG_SLAVE_POSS
= (1 << 1), /* host supports slave dev */
147 /* (doesn't imply presence) */
148 ATA_FLAG_PORT_DISABLED
= (1 << 2), /* port is disabled, ignore it */
149 ATA_FLAG_SATA
= (1 << 3),
150 ATA_FLAG_NO_LEGACY
= (1 << 4), /* no legacy mode check */
151 ATA_FLAG_SRST
= (1 << 5), /* use ATA SRST, not E.D.D. */
152 ATA_FLAG_MMIO
= (1 << 6), /* use MMIO, not PIO */
153 ATA_FLAG_SATA_RESET
= (1 << 7), /* use COMRESET */
154 ATA_FLAG_PIO_DMA
= (1 << 8), /* PIO cmds via DMA */
155 ATA_FLAG_NOINTR
= (1 << 9), /* FIXME: Remove this once
156 * proper HSM is in place. */
157 ATA_FLAG_DEBUGMSG
= (1 << 10),
158 ATA_FLAG_NO_ATAPI
= (1 << 11), /* No ATAPI support */
160 ATA_FLAG_SUSPENDED
= (1 << 12), /* port is suspended */
162 ATA_FLAG_PIO_LBA48
= (1 << 13), /* Host DMA engine is LBA28 only */
163 ATA_FLAG_IRQ_MASK
= (1 << 14), /* Mask IRQ in PIO xfers */
165 ATA_QCFLAG_ACTIVE
= (1 << 1), /* cmd not yet ack'd to scsi lyer */
166 ATA_QCFLAG_SG
= (1 << 3), /* have s/g table? */
167 ATA_QCFLAG_SINGLE
= (1 << 4), /* no s/g, just a single buffer */
168 ATA_QCFLAG_DMAMAP
= ATA_QCFLAG_SG
| ATA_QCFLAG_SINGLE
,
170 /* various lengths of time */
171 ATA_TMOUT_EDD
= 5 * HZ
, /* heuristic */
172 ATA_TMOUT_PIO
= 30 * HZ
,
173 ATA_TMOUT_BOOT
= 30 * HZ
, /* heuristic */
174 ATA_TMOUT_BOOT_QUICK
= 7 * HZ
, /* heuristic */
175 ATA_TMOUT_CDB
= 30 * HZ
,
176 ATA_TMOUT_CDB_QUICK
= 5 * HZ
,
177 ATA_TMOUT_INTERNAL
= 30 * HZ
,
178 ATA_TMOUT_INTERNAL_QUICK
= 5 * HZ
,
192 /* SATA port states */
197 /* encoding various smaller bitmaps into a single
198 * unsigned long bitmap
204 /* size of buffer to pad xfers ending on unaligned boundaries */
206 ATA_DMA_PAD_BUF_SZ
= ATA_DMA_PAD_SZ
* ATA_MAX_QUEUE
,
208 /* Masks for port functions */
209 ATA_PORT_PRIMARY
= (1 << 0),
210 ATA_PORT_SECONDARY
= (1 << 1),
213 enum hsm_task_states
{
224 enum ata_completion_errors
{
225 AC_ERR_DEV
= (1 << 0), /* device reported error */
226 AC_ERR_HSM
= (1 << 1), /* host state machine violation */
227 AC_ERR_TIMEOUT
= (1 << 2), /* timeout */
228 AC_ERR_MEDIA
= (1 << 3), /* media error */
229 AC_ERR_ATA_BUS
= (1 << 4), /* ATA bus error */
230 AC_ERR_HOST_BUS
= (1 << 5), /* host bus error */
231 AC_ERR_SYSTEM
= (1 << 6), /* system error */
232 AC_ERR_INVALID
= (1 << 7), /* invalid argument */
233 AC_ERR_OTHER
= (1 << 8), /* unknown */
236 /* forward declarations */
238 struct ata_port_operations
;
240 struct ata_queued_cmd
;
243 typedef void (*ata_qc_cb_t
) (struct ata_queued_cmd
*qc
);
246 unsigned long cmd_addr
;
247 unsigned long data_addr
;
248 unsigned long error_addr
;
249 unsigned long feature_addr
;
250 unsigned long nsect_addr
;
251 unsigned long lbal_addr
;
252 unsigned long lbam_addr
;
253 unsigned long lbah_addr
;
254 unsigned long device_addr
;
255 unsigned long status_addr
;
256 unsigned long command_addr
;
257 unsigned long altstatus_addr
;
258 unsigned long ctl_addr
;
259 unsigned long bmdma_addr
;
260 unsigned long scr_addr
;
263 struct ata_probe_ent
{
264 struct list_head node
;
266 const struct ata_port_operations
*port_ops
;
267 struct scsi_host_template
*sht
;
268 struct ata_ioports port
[ATA_MAX_PORTS
];
269 unsigned int n_ports
;
270 unsigned int hard_port_no
;
271 unsigned int pio_mask
;
272 unsigned int mwdma_mask
;
273 unsigned int udma_mask
;
274 unsigned int legacy_mode
;
276 unsigned int irq_flags
;
277 unsigned long host_flags
;
278 void __iomem
*mmio_base
;
282 struct ata_host_set
{
286 void __iomem
*mmio_base
;
287 unsigned int n_ports
;
289 const struct ata_port_operations
*ops
;
290 struct ata_port
* ports
[0];
293 struct ata_queued_cmd
{
295 struct ata_device
*dev
;
297 struct scsi_cmnd
*scsicmd
;
298 void (*scsidone
)(struct scsi_cmnd
*);
300 struct ata_taskfile tf
;
301 u8 cdb
[ATAPI_CDB_LEN
];
303 unsigned long flags
; /* ATA_QCFLAG_xxx */
306 unsigned int orig_n_elem
;
310 unsigned int pad_len
;
313 unsigned int cursect
;
316 unsigned int curbytes
;
319 unsigned int cursg_ofs
;
321 struct scatterlist sgent
;
322 struct scatterlist pad_sgent
;
325 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
326 struct scatterlist
*__sg
;
328 unsigned int err_mask
;
330 ata_qc_cb_t complete_fn
;
335 struct ata_host_stats
{
336 unsigned long unhandled_irq
;
337 unsigned long idle_irq
;
338 unsigned long rw_reqbuf
;
342 u64 n_sectors
; /* size of device, if ATA */
343 unsigned long flags
; /* ATA_DFLAG_xxx */
344 unsigned int class; /* ATA_DEV_xxx */
345 unsigned int devno
; /* 0 or 1 */
346 u16 id
[ATA_ID_WORDS
]; /* IDENTIFY xxx DEVICE data */
350 unsigned int xfer_shift
; /* ATA_SHIFT_xxx */
352 unsigned int multi_count
; /* sectors count for
353 READ/WRITE MULTIPLE */
355 /* for CHS addressing */
356 u16 cylinders
; /* Number of cylinders */
357 u16 heads
; /* Number of heads */
358 u16 sectors
; /* Number of sectors per track */
362 struct Scsi_Host
*host
; /* our co-allocated scsi host */
363 const struct ata_port_operations
*ops
;
364 unsigned long flags
; /* ATA_FLAG_xxx */
365 unsigned int id
; /* unique id req'd by scsi midlyr */
366 unsigned int port_no
; /* unique port #; from zero */
367 unsigned int hard_port_no
; /* hardware port #; from zero */
369 struct ata_prd
*prd
; /* our SG list */
370 dma_addr_t prd_dma
; /* and its DMA mapping */
372 void *pad
; /* array of DMA pad buffers */
375 struct ata_ioports ioaddr
; /* ATA cmd/ctl/dma register blocks */
377 u8 ctl
; /* cache of ATA control register */
378 u8 last_ctl
; /* Cache last written value */
379 unsigned int pio_mask
;
380 unsigned int mwdma_mask
;
381 unsigned int udma_mask
;
382 unsigned int cbl
; /* cable type; ATA_CBL_xxx */
383 unsigned int cdb_len
;
385 struct ata_device device
[ATA_MAX_DEVICES
];
387 struct ata_queued_cmd qcmd
[ATA_MAX_QUEUE
];
388 unsigned long qactive
;
389 unsigned int active_tag
;
391 struct ata_host_stats stats
;
392 struct ata_host_set
*host_set
;
394 struct work_struct packet_task
;
396 struct work_struct pio_task
;
397 unsigned int hsm_task_state
;
398 unsigned long pio_task_timeout
;
405 struct ata_port_operations
{
406 void (*port_disable
) (struct ata_port
*);
408 void (*dev_config
) (struct ata_port
*, struct ata_device
*);
410 void (*set_piomode
) (struct ata_port
*, struct ata_device
*);
411 void (*set_dmamode
) (struct ata_port
*, struct ata_device
*);
413 void (*tf_load
) (struct ata_port
*ap
, const struct ata_taskfile
*tf
);
414 void (*tf_read
) (struct ata_port
*ap
, struct ata_taskfile
*tf
);
416 void (*exec_command
)(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
417 u8 (*check_status
)(struct ata_port
*ap
);
418 u8 (*check_altstatus
)(struct ata_port
*ap
);
419 void (*dev_select
)(struct ata_port
*ap
, unsigned int device
);
421 void (*phy_reset
) (struct ata_port
*ap
);
422 void (*post_set_mode
) (struct ata_port
*ap
);
424 int (*check_atapi_dma
) (struct ata_queued_cmd
*qc
);
426 void (*bmdma_setup
) (struct ata_queued_cmd
*qc
);
427 void (*bmdma_start
) (struct ata_queued_cmd
*qc
);
429 void (*qc_prep
) (struct ata_queued_cmd
*qc
);
430 int (*qc_issue
) (struct ata_queued_cmd
*qc
);
432 void (*eng_timeout
) (struct ata_port
*ap
);
434 irqreturn_t (*irq_handler
)(int, void *, struct pt_regs
*);
435 void (*irq_clear
) (struct ata_port
*);
437 u32 (*scr_read
) (struct ata_port
*ap
, unsigned int sc_reg
);
438 void (*scr_write
) (struct ata_port
*ap
, unsigned int sc_reg
,
441 int (*port_start
) (struct ata_port
*ap
);
442 void (*port_stop
) (struct ata_port
*ap
);
444 void (*host_stop
) (struct ata_host_set
*host_set
);
446 void (*bmdma_stop
) (struct ata_queued_cmd
*qc
);
447 u8 (*bmdma_status
) (struct ata_port
*ap
);
450 struct ata_port_info
{
451 struct scsi_host_template
*sht
;
452 unsigned long host_flags
;
453 unsigned long pio_mask
;
454 unsigned long mwdma_mask
;
455 unsigned long udma_mask
;
456 const struct ata_port_operations
*port_ops
;
461 unsigned short mode
; /* ATA mode */
462 unsigned short setup
; /* t1 */
463 unsigned short act8b
; /* t2 for 8-bit I/O */
464 unsigned short rec8b
; /* t2i for 8-bit I/O */
465 unsigned short cyc8b
; /* t0 for 8-bit I/O */
466 unsigned short active
; /* t2 or tD */
467 unsigned short recover
; /* t2i or tK */
468 unsigned short cycle
; /* t0 */
469 unsigned short udma
; /* t2CYCTYP/2 */
472 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
474 extern void ata_port_probe(struct ata_port
*);
475 extern void __sata_phy_reset(struct ata_port
*ap
);
476 extern void sata_phy_reset(struct ata_port
*ap
);
477 extern void ata_bus_reset(struct ata_port
*ap
);
478 extern void ata_port_disable(struct ata_port
*);
479 extern void ata_std_ports(struct ata_ioports
*ioaddr
);
481 extern int ata_pci_init_one (struct pci_dev
*pdev
, struct ata_port_info
**port_info
,
482 unsigned int n_ports
);
483 extern void ata_pci_remove_one (struct pci_dev
*pdev
);
484 extern int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
);
485 extern int ata_pci_device_resume(struct pci_dev
*pdev
);
486 #endif /* CONFIG_PCI */
487 extern int ata_device_add(const struct ata_probe_ent
*ent
);
488 extern void ata_host_set_remove(struct ata_host_set
*host_set
);
489 extern int ata_scsi_detect(struct scsi_host_template
*sht
);
490 extern int ata_scsi_ioctl(struct scsi_device
*dev
, int cmd
, void __user
*arg
);
491 extern int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*));
492 extern int ata_scsi_error(struct Scsi_Host
*host
);
493 extern int ata_scsi_release(struct Scsi_Host
*host
);
494 extern unsigned int ata_host_intr(struct ata_port
*ap
, struct ata_queued_cmd
*qc
);
495 extern int ata_scsi_device_resume(struct scsi_device
*);
496 extern int ata_scsi_device_suspend(struct scsi_device
*);
497 extern int ata_device_resume(struct ata_port
*, struct ata_device
*);
498 extern int ata_device_suspend(struct ata_port
*, struct ata_device
*);
499 extern int ata_ratelimit(void);
502 * Default driver ops implementations
504 extern void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
505 extern void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
);
506 extern void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
);
507 extern void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
);
508 extern void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
);
509 extern void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
);
510 extern u8
ata_check_status(struct ata_port
*ap
);
511 extern u8
ata_altstatus(struct ata_port
*ap
);
512 extern void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
513 extern int ata_port_start (struct ata_port
*ap
);
514 extern void ata_port_stop (struct ata_port
*ap
);
515 extern void ata_host_stop (struct ata_host_set
*host_set
);
516 extern irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
);
517 extern void ata_qc_prep(struct ata_queued_cmd
*qc
);
518 extern int ata_qc_issue_prot(struct ata_queued_cmd
*qc
);
519 extern void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
,
520 unsigned int buflen
);
521 extern void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
522 unsigned int n_elem
);
523 extern unsigned int ata_dev_classify(const struct ata_taskfile
*tf
);
524 extern void ata_dev_id_string(const u16
*id
, unsigned char *s
,
525 unsigned int ofs
, unsigned int len
);
526 extern void ata_dev_config(struct ata_port
*ap
, unsigned int i
);
527 extern void ata_bmdma_setup (struct ata_queued_cmd
*qc
);
528 extern void ata_bmdma_start (struct ata_queued_cmd
*qc
);
529 extern void ata_bmdma_stop(struct ata_queued_cmd
*qc
);
530 extern u8
ata_bmdma_status(struct ata_port
*ap
);
531 extern void ata_bmdma_irq_clear(struct ata_port
*ap
);
532 extern void ata_qc_complete(struct ata_queued_cmd
*qc
);
533 extern void ata_eng_timeout(struct ata_port
*ap
);
534 extern void ata_scsi_simulate(struct ata_port
*ap
, struct ata_device
*dev
,
535 struct scsi_cmnd
*cmd
,
536 void (*done
)(struct scsi_cmnd
*));
537 extern int ata_std_bios_param(struct scsi_device
*sdev
,
538 struct block_device
*bdev
,
539 sector_t capacity
, int geom
[]);
540 extern int ata_scsi_slave_config(struct scsi_device
*sdev
);
546 extern unsigned int ata_pio_need_iordy(const struct ata_device
*);
547 extern int ata_timing_compute(struct ata_device
*, unsigned short,
548 struct ata_timing
*, int, int);
549 extern void ata_timing_merge(const struct ata_timing
*,
550 const struct ata_timing
*, struct ata_timing
*,
554 ATA_TIMING_SETUP
= (1 << 0),
555 ATA_TIMING_ACT8B
= (1 << 1),
556 ATA_TIMING_REC8B
= (1 << 2),
557 ATA_TIMING_CYC8B
= (1 << 3),
558 ATA_TIMING_8BIT
= ATA_TIMING_ACT8B
| ATA_TIMING_REC8B
|
560 ATA_TIMING_ACTIVE
= (1 << 4),
561 ATA_TIMING_RECOVER
= (1 << 5),
562 ATA_TIMING_CYCLE
= (1 << 6),
563 ATA_TIMING_UDMA
= (1 << 7),
564 ATA_TIMING_ALL
= ATA_TIMING_SETUP
| ATA_TIMING_ACT8B
|
565 ATA_TIMING_REC8B
| ATA_TIMING_CYC8B
|
566 ATA_TIMING_ACTIVE
| ATA_TIMING_RECOVER
|
567 ATA_TIMING_CYCLE
| ATA_TIMING_UDMA
,
573 unsigned int reg
; /* PCI config register to read */
574 unsigned int width
; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
579 extern void ata_pci_host_stop (struct ata_host_set
*host_set
);
580 extern struct ata_probe_ent
*
581 ata_pci_init_native_mode(struct pci_dev
*pdev
, struct ata_port_info
**port
, int portmask
);
582 extern int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
);
584 #endif /* CONFIG_PCI */
588 ata_sg_is_last(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
590 if (sg
== &qc
->pad_sgent
)
594 if (((sg
- qc
->__sg
) + 1) == qc
->n_elem
)
599 static inline struct scatterlist
*
600 ata_qc_next_sg(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
602 if (sg
== &qc
->pad_sgent
)
604 if (++sg
- qc
->__sg
< qc
->n_elem
)
606 return qc
->pad_len
? &qc
->pad_sgent
: NULL
;
609 #define ata_for_each_sg(sg, qc) \
610 for (sg = qc->__sg; sg; sg = ata_qc_next_sg(sg, qc))
612 static inline unsigned int ata_tag_valid(unsigned int tag
)
614 return (tag
< ATA_MAX_QUEUE
) ? 1 : 0;
617 static inline unsigned int ata_dev_present(const struct ata_device
*dev
)
619 return ((dev
->class == ATA_DEV_ATA
) ||
620 (dev
->class == ATA_DEV_ATAPI
));
623 static inline u8
ata_chk_status(struct ata_port
*ap
)
625 return ap
->ops
->check_status(ap
);
630 * ata_pause - Flush writes and pause 400 nanoseconds.
631 * @ap: Port to wait for.
634 * Inherited from caller.
637 static inline void ata_pause(struct ata_port
*ap
)
645 * ata_busy_wait - Wait for a port status register
646 * @ap: Port to wait for.
648 * Waits up to max*10 microseconds for the selected bits in the port's
649 * status register to be cleared.
650 * Returns final value of status register.
653 * Inherited from caller.
656 static inline u8
ata_busy_wait(struct ata_port
*ap
, unsigned int bits
,
663 status
= ata_chk_status(ap
);
665 } while ((status
& bits
) && (max
> 0));
672 * ata_wait_idle - Wait for a port to be idle.
673 * @ap: Port to wait for.
675 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
676 * Returns final value of status register.
679 * Inherited from caller.
682 static inline u8
ata_wait_idle(struct ata_port
*ap
)
684 u8 status
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 1000);
686 if (status
& (ATA_BUSY
| ATA_DRQ
)) {
687 unsigned long l
= ap
->ioaddr
.status_addr
;
688 if (ata_msg_warn(ap
))
689 printk(KERN_WARNING
"ATA: abnormal status 0x%X on port 0x%lX\n",
696 static inline void ata_qc_set_polling(struct ata_queued_cmd
*qc
)
698 qc
->tf
.ctl
|= ATA_NIEN
;
701 static inline struct ata_queued_cmd
*ata_qc_from_tag (struct ata_port
*ap
,
704 if (likely(ata_tag_valid(tag
)))
705 return &ap
->qcmd
[tag
];
709 static inline void ata_tf_init(struct ata_port
*ap
, struct ata_taskfile
*tf
, unsigned int device
)
711 memset(tf
, 0, sizeof(*tf
));
715 tf
->device
= ATA_DEVICE_OBS
;
717 tf
->device
= ATA_DEVICE_OBS
| ATA_DEV1
;
720 static inline void ata_qc_reinit(struct ata_queued_cmd
*qc
)
724 qc
->cursect
= qc
->cursg
= qc
->cursg_ofs
= 0;
726 qc
->nbytes
= qc
->curbytes
= 0;
729 ata_tf_init(qc
->ap
, &qc
->tf
, qc
->dev
->devno
);
734 * ata_irq_on - Enable interrupts on a port.
735 * @ap: Port on which interrupts are enabled.
737 * Enable interrupts on a legacy IDE device using MMIO or PIO,
738 * wait for idle, clear any pending interrupts.
741 * Inherited from caller.
744 static inline u8
ata_irq_on(struct ata_port
*ap
)
746 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
749 ap
->ctl
&= ~ATA_NIEN
;
750 ap
->last_ctl
= ap
->ctl
;
752 if (ap
->flags
& ATA_FLAG_MMIO
)
753 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
755 outb(ap
->ctl
, ioaddr
->ctl_addr
);
756 tmp
= ata_wait_idle(ap
);
758 ap
->ops
->irq_clear(ap
);
765 * ata_irq_ack - Acknowledge a device interrupt.
766 * @ap: Port on which interrupts are enabled.
768 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
769 * or BUSY+DRQ clear). Obtain dma status and port status from
770 * device. Clear the interrupt. Return port status.
775 static inline u8
ata_irq_ack(struct ata_port
*ap
, unsigned int chk_drq
)
777 unsigned int bits
= chk_drq
? ATA_BUSY
| ATA_DRQ
: ATA_BUSY
;
778 u8 host_stat
, post_stat
, status
;
780 status
= ata_busy_wait(ap
, bits
, 1000);
783 printk(KERN_ERR
"abnormal status 0x%X\n", status
);
785 /* get controller status; clear intr, err bits */
786 if (ap
->flags
& ATA_FLAG_MMIO
) {
787 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
788 host_stat
= readb(mmio
+ ATA_DMA_STATUS
);
789 writeb(host_stat
| ATA_DMA_INTR
| ATA_DMA_ERR
,
790 mmio
+ ATA_DMA_STATUS
);
792 post_stat
= readb(mmio
+ ATA_DMA_STATUS
);
794 host_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
795 outb(host_stat
| ATA_DMA_INTR
| ATA_DMA_ERR
,
796 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
798 post_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
801 if (ata_msg_intr(ap
))
802 printk(KERN_INFO
"%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
804 host_stat
, post_stat
, status
);
809 static inline u32
scr_read(struct ata_port
*ap
, unsigned int reg
)
811 return ap
->ops
->scr_read(ap
, reg
);
814 static inline void scr_write(struct ata_port
*ap
, unsigned int reg
, u32 val
)
816 ap
->ops
->scr_write(ap
, reg
, val
);
819 static inline void scr_write_flush(struct ata_port
*ap
, unsigned int reg
,
822 ap
->ops
->scr_write(ap
, reg
, val
);
823 (void) ap
->ops
->scr_read(ap
, reg
);
826 static inline unsigned int sata_dev_present(struct ata_port
*ap
)
828 return ((scr_read(ap
, SCR_STATUS
) & 0xf) == 0x3) ? 1 : 0;
831 static inline int ata_try_flush_cache(const struct ata_device
*dev
)
833 return ata_id_wcache_enabled(dev
->id
) ||
834 ata_id_has_flush(dev
->id
) ||
835 ata_id_has_flush_ext(dev
->id
);
838 static inline unsigned int ac_err_mask(u8 status
)
840 if (status
& ATA_BUSY
)
842 if (status
& (ATA_ERR
| ATA_DF
))
847 static inline unsigned int __ac_err_mask(u8 status
)
849 unsigned int mask
= ac_err_mask(status
);
855 static inline int ata_pad_alloc(struct ata_port
*ap
, struct device
*dev
)
858 ap
->pad
= dma_alloc_coherent(dev
, ATA_DMA_PAD_BUF_SZ
,
859 &ap
->pad_dma
, GFP_KERNEL
);
860 return (ap
->pad
== NULL
) ? -ENOMEM
: 0;
863 static inline void ata_pad_free(struct ata_port
*ap
, struct device
*dev
)
865 dma_free_coherent(dev
, ATA_DMA_PAD_BUF_SZ
, ap
->pad
, ap
->pad_dma
);
868 #endif /* __LINUX_LIBATA_H__ */